{
  "manageEntity": {
    "action": "Save",
    "entityId": "382252",
    "entityType": "Track",
    "nonce": "0x2cfce8f32d176a006c6499605294218aa2f7788fca8d4558253627721afc144f",
    "signature": "0xc93f4ab1d5dd97416f5aedabadc7d5387959c4dd8a4beb6fef3e3d522c41831917592518297ae421c5a8bb96026b63389c048d3e3fa25ec55cb702f7a09066a11b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}